Tilting bed



G. ANDERSON.

TILTING BED.

APPLICATION FILED 05c. 13. 1911.

w r A u 1% k m m S \x 4 T N E m G. ANDERSON.

Patented J an. 27, 1920.

4 SHEETS-SHEET 2.

IN VEN TOR GyANDERSflN.

TILTING BED. APPLICAT|0N FILED DE'C.13, 1917.

Patented J an. 27, 1920.

INVENTOR I Br T c a FEE A FOR/IE7;-

G. ANDERSON.

TILTING BED. A PPLICATION FILED DEC-13, 1917. 1,328,802, Patented Jan.27, 1920.

4 SHEETS-SHEET 4.

*N R k v INVENTOH N W J I 'ca I ATTORNEY.

UNITED STATES PATENT OFFICE.

GIDEON ANDERSON, or NEW YORK, N. Y., ASSIGNOR T0 WILLIAM WEST, or NEWYORK, N. Y.

TILTING BED.

To all whom it may concern:

Be it known that I, GIDEON ANDERSON, a subject of the King of Sweden,and resident of the city'of New York, in the county of provision of amechanism of this character that will be capable of being set by anattendant for effecting a raising and lowering of the bed within certainpredetermined limits, and that may subsequently be operated by thepatient to raise and lower the bed within those limits through themedium of asimple electrical control.

With these and other objects in view, such as will appear as thedescription progresses, the invention comprises the combination andarrangement of parts as set forth in, and

falling within the scope of, the appended claims.

In the drawings:

Figu with the raising and lowering mechanism in place thereon andshowing the spring frame in a raised or inclined position.

Fig. 2 is a similar view, but on an enlarged scale and with certain ofthe parts bro en away for the clearer illustration of other parts. Inthis view the spring frame is shown in lowered position in full linesand in raised position in dotted lines.

Fig. 3 is a plan view of a portion of the mechanism with the controlcircuits illustrated diagrammatically.

Fig. 4 is a transverse sectional view through the bed and spring frame,taken on the line 44 of Fi 3, illustrating the connection of the mecanism with the bed and spring frame.

Fig. 5 is a fragmental sectional view of the flexible rack, illustratingthe pinion for operating the same and the manner in which it engages thespring frame, the section being taken on line 55 of Fig. 3.

Fig. 6 is an elevation of the setting dial.

re 1 is an elevational view of a bed .beneath the bed.

Specification of Letters Patent. Patented J an, 27, 192() Applicationfiled December 13, 1917. Serial No. 206,899.

Fig. 7 is a vertical sectional view of the same, taken on line 7-7 ofFig. 6.

Fig. 8 is a perspective view of one of the circuit breaking. switches,and

Fig. 9 is a plan view of one of the spring frame supporting elements.

Referring to the drawings, wherein "there is illustrated a.constructional form of my invention, the usual form of bed frame 1 isdisclosed, on the vertical head posts of which clamps 2 are secured bymeans of fasteners 3. These clamps are capable of pivotal movement aboutthe .head posts, and carry pivot blocks 4, which are adapted to moveabout vertical pivots parallel to the pivots of the clamps 2. The clampsmay thus be moved about the bed posts as pivots and will in turn movethe pivot blocks 4, so as to allow for any variation in the length ofthe spring frames. The spring frame illustrated in the drawing at 5, isprovided at the foot end of the bed with socket members 6 of usual form,which rest upon the side rails of the bed frame. At the opposite or head4 end of the bed the spring frame is provided with a bearing me er orbar 7 which rests within V-shaped seats in the pivot blocks 4:. Withthis construction, the foot of the spring frame is capable of beingraised, while the bar 7 rests within the pivot blocks 4, and thus theangular position of the spring frame may be varied to suit the needs ofthe particular patient.

Depending from the side bars of the bed frame are supporting rods 8,which carry at their lower ends a base 9, located in position A motor 10is mounted on this base 19, and the motor shaft 11 isextended andprovided with a worm 12, which meshes with a worm wheel 18. This wormwheel 13 is rigidly mounted on a shaft 14, which is carried in suitablebearings on the base 9, and is provided with a gear 15. This gear 15meshes with a relatively larger gear 16, which is carried by anindependent shaft 17, the latter shaft being mounted in bearings 18 onthe base. A relatively smaller gear 19 is fixed to the shaft 17' andmeshes with a large gear 20. This gear is fixed to a shaft 21, which issupported by bearings 22, and which carries a driving gear 23. Pivotallymounted on. the shaft 21 is a casing 241, which depends from the shaftand is freely movable thereon. A flexible rack is slidably mountedwithin this casing 24 and is ada ted to move longitudinally thereof. Tis rack consists of a plurality of sections 25, which are ivotedtogether .at 26 at one side of the rac and which bear against each otherat 27 at the opposite side of the rack.

The uppermost of these sections is provided be raised or lowered,depending, of course,

upon the direction of rotation of the gear. With this describedmechanism, 1t Wlll be seen that upon the energizing of the motor,

the driving gear- 23 will be set in motion, and will in turn operate therack so as to raise or lower the same, and will consequently eitherraise or lower the engaging end of the. spring frame. Of course, theraising and lowering is entirely dependent upon the direction ofrotation of the motor armature.

It should be observed that the point of support of the cross-bar 29 isdirectly over the points of contact 27 of the rack sections when thesections are arranged in a substantiallly vertical position, and thatthe pivot points of the rack sections are to one side of the verticalline passing through the points 27, so that the colla )sing of thesections, while they are exten ed from the cas.--

ing 24, will be impossible.

pair of parallel horizontally arranged ba rs 30 are supported bybrackets 31 on the base 9, said brackets being suitably insulated fromthe base, as illustrated at 32. A air of slides 33 and 34 are mounted ont ese bars 30, and extending between the same is a rack 35, which isinsulated from the slides. A .relatively small gear 36 is secured to ashaft 37 and meshes with the rack 35. This shaft is mounted in asuitable bearing 38, and is provided with a beveled pinion 39, whichmeshes with a similar pinion 40, which is carried by a shaft 41. One endof this shaft is supported by a bearing 42, and the opposite end by abearing 43. This latter bearing 43 has a dial 44 rigidly secured theretoby fasteners 45. The dial is provided with a scale, such as illustratedat.

46, which scale represents the inches which the spring frame 1s to beralsed and beside each of the representations of the scale, is

a notch 47. A handle 48 is secured at 49, to the shaft 41, so that itsmovement will cause the rotation of the shaft. The handle is, however,free to move on an axis at right angles to the axis of the shaft andindependently of the latter, whereby a suitable projection 50 on thehandle may be made to engage in one of the notches 47. This projectionis retained in its engaging positions by a spring 51, so thattheaccidental movement of the handle after having been set, will beprevented.

It will be obvious that upon the rotation of the shaft .41 the slides 33and 34 will be moved longitudinally on the bars 30. The

slide 34 carries a circuit breaking switch A, such as illustrated indetail in Fig. 8. This switch includes a pivoted blade 52, which isnormally held in engagement with a socket 53, by a spring 54 and carriesat its free end a knob 55 of insulating material. Wlll be noted that theswitch described is of the quick acting type, where the withdrawal ofthe blade from the socket 53 is accombeen put under tension in themanner which Wlll subsequentlv be described. ThlS swltch is properlyinsulated from the supporting slide 34- A controlling switch, which maybe in the form'of a push button is located in such position that it willbe within easy reach of the patient, and one terminal 57' is connectedto one pole of a. suitable source 58, while the opposite terminal isconnected When to the other pole 60 of the source. the switch is closed,a circuit will be established from the source through the terminal 57the conductor 61 to one of the supporting brackets 31, through theadjacent bar 30, through the switch blade 52 to the op-' posite bar 30,through the bar 30 and the adjacent bracket 31 to a conductor 62,through the conductor 62 to the motor 10,

and through a conductor 63 through the terminal 59 f the controllingswitch, back to the source. Thus when the switch blade 52 and thecontrolling switch are closed, the motor will actuate the train of gearsabove described, and raise the spring frame. In

,85 plished bv a spring 56, after the latter has i order that .thespring frame may be lowered, a second switch A, similar to'thatillustrated in Fig. 8, is provided, and this 1' switch is included in acircuit from the source, through one ,terminal of a controlling switchor push button 64, through a conductor 65, through the switch, through aconductor 66, through the motor 10 in the reverse direction, through theconductor 62 and the terminal 67 of the controlling switch, back to thesource.

The end of the shaft 14, which is directly driven by'the motor throughthe worm 11 and the intermeshin worm wheel 13, is extended and threadeat 68. This threaded end passes through and is in threaded en- 1gagement with a sliding block 69, which is guided by a channel 70 in thebase 9 and carries a pair of projecting plungers 71 and 72, which areadapted to'engage the respec-.

the circuit breaking switches to arrest the operation of the motor andconsequently the upward or downward movement of the spring frame. I

In operation, assuming for example, that it is desired to raise thespring frame at one end to the extent of twelve inches, the attendantrotates the shaft -11 by means of the handle 48 until the projection 50on the handle engages the notch opposite the twelve inch indication onthe dial i6. This rotation of the shaft advances the switch A toward theadjacent plunger 71 and brings it to a predetermined position relativethereto. When the motor is now energized, the block 69 will move towardthe switch A until the plunger 71 engages the knob and causes thebreaking of the circuit by the disengagement of the switch blade 52. Atthis time the motor will be deenergized and the upward movement of thebed arrested. Of course, when it is desired to lower the spring framethe opposite push button is operated by the patient and the rotation ofthe motor armature in the opposite direction will cause a retrogrademovement of the block 69. Retrogrademovement will continue until theplunger 72 engages the knob of the circuit breaking switch A, at whichtime the motor will again be deenergized and the spring frame will be ina horizontal or lowered position.

WVith this construction it will be seen that the attendant need only tofirst set the dial to the desired point, and the actual raising orlowering of the spring frame within the limits so set or determined maybe subsequently brought about by through a simple electrical control.

What I claim is 1. The combination with a pivoted bed spring frame, ofmeans including a motor, for raising and lowering the same about itspivot, circuit breaking switches interpolated in the motor circuits,means advanced by the motor for selectively engaging said switches,

the patient and means for varying the positions of said switches withrelation to the last mentioned means, whereby the period of energizationof the motor may be varied.

2. The combination with a pivoted bed spring frame, of means for raisingand lowering the same about its pivot, said means including a motor, anarticulate rack and a gear actuated by the motor and meshing with therack, circuit breaking switches interpolated in the motor circuits,means reciprocated by the motor for selectively engaging the switches,and means for adjusting the position of one of said switches withrelation to the last mentioned means.

3. The combination with a pivoted bed spring frame, ofxmeans including amotor for raising and lowering the frame about its pivot, circuitbreaking switches interpolated in the motor circuits, at screw-threadedshaft driven by the motor, a block mounted to be moved longitudinally onthe shaft, a plunger carried by the block and adapted to engage and toopen the switches, selectively, and means for adjusting the position ofone of the switches with relation to the plungers.

l. The combination with a bed and a spring frame pivoted thereon, ofmeans including a motor for raising and lowerin the frame about itspivot, means advancet by the motor for selectively enga 'ing theswitches, and means for varying t e position of one of the switches withrelation to the last-mentioned means, said means including a handlemounted on the bed and within reach of the occupant thereof, and meansconnecting the handle to one of the switches.

-Signed at New York, in the county of New York, and State of New York,this 8th day of December, 'A. D. 1917.

GIDEON ANDERSON.

Witnesses C. J. BUT ER, CHAs. F, DANE.

